borderline significantP = 0.057
All the four patients with proteinuria had hypocomplementemia with a median complement C3 level of 0.7 (0.7–0.8) g/L, while the patients without proteinuria ( n = 6) had a higher median level of 0.9 (0.8–1.1) g/L, and there was borderline significant difference between the two groups ( P = 0.057).